ΔE 16.2, loose: different enough that you should pick on purpose. Moonray Flesh is noticeably lighter, warmer than Krieg Khaki.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Moonray Flesh is noticeably lighter, warmer than Krieg Khaki.
The same difference applies the other way round: Krieg Khaki is noticeably darker, cooler.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Krieg Khaki on the colour wheel See Moonray Flesh on the colour wheel
All matches: Krieg Khaki equivalents · Moonray Flesh equivalents